Malicious PDF — malware analysis report

Static analysis result for SHA-256 f077de91ffd1de7b…

MALICIOUS

PDF

67.3 KB Created: 2021-04-05 01:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94a74365e5eed0dc9151304a998eab2d SHA-1: 25ff518f7b14d592a3080dd1c9fae34a6119a2be SHA-256: f077de91ffd1de7b03bc4ab6807550236b78ca2e7062b95e92c3ada04df01c9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external links, including one that appears to be a lure for watching a movie online, suggesting a phishing or malware distribution campaign. The presence of a link farm heuristic further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/strik?utm_term=all+my+sons+movie+watch+online
    • https://gelasapatawo.weebly.com/uploads/1/3/0/8/130874371/df36ce77a16ef.pdf
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/839063.pdf
    • https://cdn.sqhk.co/xulawajikigi/S7WuhGY/wewopanodurozegokajigi.pdf
    • https://cdn-cms.f-static.net/uploads/4387711/normal_604d0230bc337.pdf
    • https://lirisuvobuku.weebly.com/uploads/1/3/5/3/135399047/a3e79dd91b8d9bd.pdf
    • https://cdn.sqhk.co/wirujurumugi/hf9SE3H/hexagon_number_puzzle_app.pdf
    • http://wapividazofar.scienceontheweb.net/calorie_counter_book.pdf
    • https://cdn.sqhk.co/tunixomaj/ggjhgch/bowakitopo.pdf
    • https://cdn-cms.f-static.net/uploads/4473938/normal_602ad552c7440.pdf
    • https://nexojavadu.weebly.com/uploads/1/3/0/7/130775828/vonotezavixapudug.pdf
    • https://cdn-cms.f-static.net/uploads/4408864/normal_606147329ac40.pdf
    • https://luxaxezasu.weebly.com/uploads/1/3/1/3/131398230/furulajo.pdf
    • https://cdn.sqhk.co/wanolugago/EghSpeq/duck_hunting_games_play_online_free.pdf
    • http://sakulog.sportsontheweb.net/wimavilaxuxotujozosoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_5b238808bc3e45d4954b257943cdc7a4.pdf?index=true
    • https://dd6f0c70-611b-430f-b219-ee0593fd0e1f.filesusr.com/ugd/d60051_4595f2623f7a4e6492083dee62efad7c.pdf?index=true
    • https://s3.amazonaws.com/woxojuxafopuv/rizagakenuribatetam.pdf
    • https://s3.amazonaws.com/vasofirida/bedsheets_online_shopping_india.pdf
    • https://s3.amazonaws.com/xapota/how_to_replace_acer_aspire_e15_keyboard.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbe2.bin
cf30da9401a2038bcb212c595237cba03c145368fd251ffcaaf1e3e37ae4145b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE2 5184 bytes
font_01_sfnt_off0000dd7b.bin
799badc498acae743f02eafc3d830434810a9a06755fdb735abd1d237967e15b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7B 10176 bytes

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